/// <reference types="node" />
import ITransport from './ITransport';
/**
 * Interface used to communicate with the usb device.
 *
 * @ignore
 * @interface IUsbTransport
 */
export default interface IUsbTransport extends ITransport {
    /**
     * A number which determins how long the event read loop should wait
     * until it proceeds to the next iteration.
     *
     * @type {number}
     * @memberof IUsbTransport
     */
    eventLoopSpeed: number;
    /**
     * A setter function for the eventLoopSpeed class attribute.
     *
     * @param {number} [timeout] Timeout parameter used to configure the event loop speed.
     * @memberof IUsbTransport
     */
    setEventLoopReadSpeed(timeout?: number): void;
    /**
     * Starts the read event loop.
     *
     * @memberof IUsbTransport
     */
    initEventLoop(): void;
    /**
     * A function that spins up the event loop that
     * emitts an event as soon as a message is read back from the device.
     *
     * @returns {Promise<void>} Void
     * @memberof IUsbTransport
     */
    startListen(): Promise<void>;
    /**
     * A helper function which sets up a listener for the provided
     * message parameter and resolves as soon as that message is
     * emitted from the read event loop.
     *
     * @param {string} message The name of the event to listen to.
     * @param {number} [timeout] An optional parameter used to determin
     * how long the function should wait for the event to happen before
     * it times out.
     * @returns {Promise<any>} The decoded message that is received from
     * the device.
     * @memberof IUsbTransport
     */
    receiveMessage(message: string, timeout?: number): Promise<any>;
    /**
     * Reads messages from the device.
     *
     * @param {string} [receiveMsg] An optional parameter used to log the message that is expected
     * to be sent from the camera back.
     * @param {number} [timeout] An optional parameter that controls how long to wait for a
     * message to be received until it times out.
     * @returns {Promise<any>} Returns an object that represend the decoded message received from
     * the device.
     * @memberof IUsbTransport
     */
    read(receiveMsg?: string, timeout?: number): Promise<any>;
    /**
     * Sends a message to the device.
     *
     * @param {string} cmd The command message to be sent.
     * @param {Buffer} [payload] The payload accompanying the message.
     * @returns {Promise<any>} A promise that resolves in case the message is
     * sucessfully sent to the device, otherwise it rejects with an error message.
     * @memberof IUsbTransport
     */
    write(cmd: string, payload?: Buffer): Promise<any>;
    /**
     * Send a subscription message to the device.
     *
     * @param {string} command The message to subscribed to.
     * @returns {Promise<any>} A promise representing the status of the subscription action.
     * @memberof IUsbTransport
     */
    subscribe(command: string): Promise<any>;
    /**
     * Send an unsubscription message to the device.
     *
     * @param {string} command The message to unsubscribed to.
     * @returns {Promise<any>} A promise representing the status of the unsubscription action.
     * @memberof IUsbTransport
     */
    unsubscribe(command: string): Promise<any>;
    /**
     * Performs a communication reset sequence on the device.
     *
     * @returns {Promise<any>} A promise representing the status of the clear action.
     * @memberof IUsbTransport
     */
    clear(): Promise<any>;
    /**
     * Removes all listeners and stops the read event loop.
     *
     * @returns {Promise<void>} Void
     * @memberof IUsbTransport
     */
    stopEventLoop(): Promise<void>;
}